The web-based Secunia OSI service has been discontinued. We now recommend the Secunia PSI application for Windows PCs. The FileHippo App Manager is also an excellent alternative. Check-and-secure is a great way to test your browser’s security (when it’s online).
Note: Secunia was acquired by Flexera in 2015. The Secunia brand still exists, but it is gradually being replaced by Flexera.
The PSI scanner installs itself as a pair of Windows services and configures itself to stay running in the background, checking for out of date software. The scanner is a Java application, and seems to be somewhat resource-intensive, so you might want to consider configuring it to run only on demand rather than having it scan continuously. Once PSI is running, click ‘Settings’ at the bottom of the main PSI dialog. Disable ‘Start on boot’.
We recommend that you configure PSI to only notify you of available updates and not to download and install them automatically. In our testing we have found that PSI is somewhat over-eager, and may install updates that you don’t actually want. Once PSI is running, click ‘Settings’ at the bottom of the main PSI dialog. Enable ‘Detailed view’, and open ‘Update handling’ and select ‘Notify’. You should do this as soon as possible after starting PSI for the first time to avoid problems.
Another way to avoid unwanted updates is to configure PSI to ignore specific software: right-click on an entry in the list of installed software, and select ‘Ignore updates to this program’.